EP1179121A1 - Mecanisme de commande multiple electromagnetique - Google Patents

Mecanisme de commande multiple electromagnetique

Info

Publication number
EP1179121A1
EP1179121A1 EP00943573A EP00943573A EP1179121A1 EP 1179121 A1 EP1179121 A1 EP 1179121A1 EP 00943573 A EP00943573 A EP 00943573A EP 00943573 A EP00943573 A EP 00943573A EP 1179121 A1 EP1179121 A1 EP 1179121A1
Authority
EP
European Patent Office
Prior art keywords
housing
armature
multiple actuator
actuator according
electromagnets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00943573A
Other languages
German (de)
English (en)
Other versions
EP1179121B1 (fr
Inventor
Erwin Bauer
Albert Hörl-Liegl
Ferdinand Löbbering
Stefan Loidl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Siemens AG
Original Assignee
Bayerische Motoren Werke AG
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7908182&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1179121(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bayerische Motoren Werke AG, Siemens AG filed Critical Bayerische Motoren Werke AG
Publication of EP1179121A1 publication Critical patent/EP1179121A1/fr
Application granted granted Critical
Publication of EP1179121B1 publication Critical patent/EP1179121B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
    • H01F7/123—Guiding or setting position of armatures, e.g. retaining armatures in their end position by ancillary coil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1638—Armatures not entering the winding

Definitions

  • the invention relates to an electromagnetic multiple actuator, in particular for two gas exchange valves of an internal combustion engine.
  • Actuators for gas exchange valves of internal combustion engines are known.
  • electromagnetically driven valves for opening and closing are activated depending on the rotational position of the crankshaft.
  • the actuator must be able to apply high forces, especially when opening an exhaust valve, and the respective end position of the gas exchange valve when opening and closing must be reached with certainty.
  • An electromagnetic actuator is known for example from DE 197 35 375 C2. It has an armature which is held by two springs in a central position between two electromagnets. By energizing one of the electromagnets, the armature can be drawn into the respective end position assigned to the electromagnet and held there. In order to transfer the actuator and thus the gas exchange valve driven by it from one end position to the other, the energization of the holding coil is terminated and the other coil is energized, whereby the armature is moved into the other end position under the force of the springs and the switched-on electromagnet.
  • the stroke movement of the actuator In order to control the actuator movement, for example to control the valve movement in an internal combustion engine, the stroke movement of the actuator must be measured continuously.
  • the valve lift of a gas exchange valve In an internal combustion engine, the valve lift of a gas exchange valve is usually 8 mm. This stroke must be measured to an accuracy of approximately 1/100 mm in order to enable effective valve control.
  • the electromagnetic drive of the actuator must exert considerable forces, which is why, on the one hand, the area of the armature and the electromagnets should be as large as possible and, on the other hand, there is a strong thermal load on the electromagnets.
  • the space available for an actuator, which drives a gas exchange valve of an internal combustion engine, for example, is limited.
  • the invention is therefore based on the object of specifying an electromagnetic actuator which is compact, is capable of exerting high forces and does not need to be connected to a cooling circuit.
  • At least two individual actuators are combined to form a multiple actuator.
  • a multiple actuator has a housing through which run at least two anchor shafts, on each of which an anchor is attached, which lies between two electromagnets and is held in a rest position by two springs.
  • the springs are preferably outside the housing. Then the coil cores are easier to attach.
  • the housing also takes over the longitudinal guidance of the armature along the axis of the armature shaft, so that a separate anti-rotation device, which is necessary in the prior art, can be omitted, since the armature can no longer follow the rotation caused by the springs due to the longitudinal guidance.
  • the construction according to the invention further reduces the parts of the actuator, as a result of which the assembly is considerably simplified.
  • the housing is preferably first produced in one piece and then broken at predetermined breaking points, so that an optimal fit is achieved after the housing parts which are held together by bolts which run through at least one side wall are joined together.
  • the position of the armature of each actuator part is preferably measured by contactless measurement by means of magnetic field-sensitive measuring sensors, which are fastened to the housing of the multiple actuator, and associated permanent magnets, which are each fixedly attached with respect to the armature. Each permanent magnet creates a stray magnetic field.
  • the associated magnetic field-sensitive measuring sensor detects the position of the permanent magnet and thus the position of the armature. If the multiple actuator drives gas exchange valves of an internal combustion engine, the position of the armature is assigned to that of the respective gas exchange valve.
  • the principle according to the invention can be applied to entire actuator strips; for example, all actuators on the inlet or outlet side of an internal combustion engine can be combined in one actuator strip.
  • vertical partition walls can be provided in the housing.
  • FIG. 2 is an exploded view of a lower housing part of a multiple actuator with lower coil core and liners
  • Fig. 3 is an exploded view of a lower housing part of a multiple actuator with built-in coil core and with two lower windings and
  • FIG. 1 shows a section through an electromagnetic multiple actuator which drives at least two disk valves, which are gas exchange valves of an internal combustion engine.
  • the multiple actuator drives two intake valves of a cylinder.
  • the section of FIG. 1 shows only one of these valves with the associated actuator part.
  • the electromagnetic multiple actuator of FIG. 1 is fastened to the cylinder head 60 of an internal combustion engine and drives a gas exchange valve.
  • the multiple actuator has a plate-shaped armature 10 in a housing for each gas exchange valve to be driven, which armature sits on an armature shaft 9, which in turn rests on a valve shaft 64.
  • the armature shaft 9 projects into a recess 63 of the cylinder head 60 in which the gas exchange valve is seated, which has a valve plate 62 with a valve seat 61.
  • valve plate 62 is pressed upwards by a spring 68, which is clamped between a washer 69, which rests in the recess 63 on the cylinder head 60, and a valve spring plate 67 attached to the valve stem 64, to an end position in which the valve seat 61 the gas exchange valve closes.
  • the spring 68 also acts on the armature shaft 9 and the armature 10.
  • a spring 12 which presses the armature shaft 9 down is clamped between an armature spring plate 13 fastened to the armature armature and a washer 11 resting on the housing.
  • the armature 10 is located in the housing, which is constructed from a lower housing part 3, an upper housing part 1 and a housing middle part 2, between two electromagnets.
  • the lower electromagnet consists of a lower coil core 6 and a lower winding 8, the upper electromagnet of an upper coil core 5 and an upper winding 7.
  • the housing parts are screwed together.
  • the windings 7, 8 are energized by suitable driver circuits which are controlled by a control circuit (not shown).
  • the end faces of the coil cores are stops for the armature 10 and define its end positions.
  • the springs 12, 68 hold the armature 10 in the non-energized windings 7, 8 in a rest position between these end positions, from which it can be deflected by means of the electromagnets.
  • armature shafts 9 run through the housing of the electromagnetic multiple actuator. Each is guided in bushings 4. For each anchor shaft 9 there is one bushing 4 in the upper housing part 1, the other in the lower housing part 3.
  • Fig. 2 it can be seen that for the multiple actuator only a single lower coil core 6 is provided for all electromagnets on the underside.
  • This coil core 6 has suitable slots 19 for receiving the windings 8 and a hole 18 for each armature shaft 9. Aligned with each hole 18, a bushing 4 is located below the coil core 6, which is fastened in the lower housing part 3 and guides the corresponding armature shaft 9.
  • the slots 19 interact with corresponding profiles of the inner wall of the lower housing part 3, so that there are recordings for the windings 8, as can be clearly seen in FIG. 3.
  • the connections 20 of the windings 8 protrude outward through corresponding openings, so that they can be contacted and connected to the driver circuits.
  • In the corners of the lower housing part 3 there are bores 17 through which the stud bolts 58 run, which connect the housing parts to one another and to the cylinder head 60 of the internal combustion engine.
  • the housing underside 15 makes optimum use of the area available on the cylinder head 60 of the internal combustion engine. This eliminates the need for separate cooling of the multiple actuator, since there is a large area for heat transfer between the lower housing part 3 and the cooled cylinder head 60
  • the upper housing part 1 is constructed analogously to the lower housing part 3 constructed in FIGS. 2 and 3. Arranged between these two housing parts 1, 3 is the middle housing part 2, which has guide elements 19a which take over the longitudinal guidance of the armature 10 (cf. FIG. 1). This longitudinal guidance eliminates the need for a separate anti-rotation device, since the armature 10 no longer follows the rotation caused by the springs 12, 68, which occurs when they are compressed.
  • Good heat transport from the upper housing part 1 to in contact with the cylinder head is via the side walls of the housing, for example via the side wall 16 (cf. FIG. 2), which are made from a good warming material, in this case aluminum 60 lower housing part 2 possible.
  • the heat loss generated in the upper electromagnets can thus be transported well to the underside 15 of the housing, where it is dissipated through contact with the cooled cylinder head 60.
  • the stud bolts with which the housing parts 1, 2 and 3 are attached to one another and to the cylinder head 60 can move to the outermost edge of the housing, so that the Anchor 10 make optimal use of the available space.
  • the gas exchange valves can thus be driven with maximum force.
  • the housing is made in two parts. It is first made in one piece and a predetermined breaking point is grooved. Then the housing is broken into an upper and a lower part at this predetermined breaking point. The liners 4, the coil cores 5, 6 and the windings 7, 8 are then inserted and the armature shafts 9 with the armatures 10 are inserted. Then the upper and lower parts are put together again, with the fracture surface achieving a very high degree of dimensional accuracy. In addition, the heat transfer over this fracture surface is better than over normal butt surfaces due to its large interlocking. Finally, there are no processing steps on the contact surfaces, as a result of which the manufacturing outlay for the housing is reduced.
  • a magnetic field-sensitive measuring sensor 51 is fastened on the upper side 14 of the housing by means of a holder 52 and screws 53. It is a giant MR sensor. However, measuring sensors working according to another principle, or a combination of measuring sensors, are also possible as measuring sensors 51.
  • annular permanent magnet 50 can be used, which is rotationally symmetrical to the axis of the armature shaft 9.
  • a plurality of magnetic field-sensitive sensors 51 in one arrangement, e.g. a Wheatstone bridge or a differential arrangement on an armature shaft 9 in order to determine the position of a permanent magnet 50.
  • the permanent magnet 50 can be firmly connected to the measuring sensor 51 be, and the valve stem 9 or a component attached to it made of soft magnetic or ferromagnetic material. This material then moves relative to the sensor, which is located in the air gap between the moving part and the permanent magnet 50.
  • more than two gas exchange valves can also be actuated by a single multiple actuators.
  • vertical partition walls can then be provided, which are formed between the individual actuator parts or double actuators.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

L'invention concerne un mécanisme de commande pour soupape à commande électromécanique pour lequel il est prévu un boîtier (1, 2, 3) à travers lequel passent plusieurs arbres (9) qui présentent chacun un induit (10) et deux électroaimants qui se trouvent tous les deux dans le boîtier. Deux ressorts (12, 68) sollicitent chaque induit (10) dans une position de repos entre les électroaimants. Cette construction permet d'exploiter optimalement la surface de base disponible, par l'intermédiaire d'une soupape à actionner. L'induit (10) présente une surface maximale et une dissipation optimale de la chaleur peut être obtenue par l'intermédiaire de la face inférieure correspondante (15) du boîtier.
EP00943573A 1999-05-14 2000-05-12 Mecanisme de commande multiple electromagnetique Revoked EP1179121B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19922427 1999-05-14
DE19922427A DE19922427A1 (de) 1999-05-14 1999-05-14 Elektromagnetischer Mehrfachstellantrieb
PCT/DE2000/001500 WO2000070196A1 (fr) 1999-05-14 2000-05-12 Mecanisme de commande multiple electromagnetique

Publications (2)

Publication Number Publication Date
EP1179121A1 true EP1179121A1 (fr) 2002-02-13
EP1179121B1 EP1179121B1 (fr) 2003-04-02

Family

ID=7908182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00943573A Revoked EP1179121B1 (fr) 1999-05-14 2000-05-12 Mecanisme de commande multiple electromagnetique

Country Status (5)

Country Link
US (1) US6526928B2 (fr)
EP (1) EP1179121B1 (fr)
JP (1) JP2002544433A (fr)
DE (2) DE19922427A1 (fr)
WO (1) WO2000070196A1 (fr)

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DE10010048C5 (de) * 2000-03-02 2005-12-22 Daimlerchrysler Ag Vorrichtung zum Betätigen eines Gaswechselventils mit einem elektromagnetischen Aktuator
DE20115060U1 (de) * 2001-09-12 2002-01-31 Trw Deutschland Gmbh Nockenwellenloser Aktuator für Betätigung eines Hubventils
FR2851367B1 (fr) * 2003-02-18 2008-02-29 Peugeot Citroen Automobiles Sa Actionneur electromecanique de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel actionneur
FR2851289B1 (fr) * 2003-02-18 2007-04-06 Peugeot Citroen Automobiles Sa Actionneur electromecanique de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel actionneur
FR2851292B1 (fr) * 2003-02-18 2007-02-23 Peugeot Citroen Automobiles Sa Actionneur electromecanique de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel ationneur
FR2851291B1 (fr) * 2003-02-18 2006-12-08 Peugeot Citroen Automobiles Sa Actionneur electromecanique de commande de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel actionneur
US6763789B1 (en) 2003-04-01 2004-07-20 Ford Global Technologies, Llc Electromagnetic actuator with permanent magnet
US20050001702A1 (en) * 2003-06-17 2005-01-06 Norton John D. Electromechanical valve actuator
US7089894B2 (en) * 2003-10-14 2006-08-15 Visteon Global Technologies, Inc. Electromechanical valve actuator assembly
US7255073B2 (en) * 2003-10-14 2007-08-14 Visteon Global Technologies, Inc. Electromechanical valve actuator beginning of stroke damper
US20050076866A1 (en) * 2003-10-14 2005-04-14 Hopper Mark L. Electromechanical valve actuator
US7152558B2 (en) * 2003-10-14 2006-12-26 Visteon Global Technologies, Inc. Electromechanical valve actuator assembly
US7305943B2 (en) 2005-02-23 2007-12-11 Visteon Global Technologies, Inc. Electromagnet assembly for electromechanical valve actuators
US7305942B2 (en) * 2005-02-23 2007-12-11 Visteon Global Technologies, Inc. Electromechanical valve actuator
DE202011003471U1 (de) * 2011-03-03 2011-05-05 Bürkert Werke GmbH Magnetventil
TWI426195B (zh) * 2011-09-14 2014-02-11 Univ Nat Taipei Technology 電子氣閥機構
CN103423504A (zh) * 2013-08-05 2013-12-04 西南交通大学 一种大功率双向电磁驱动式阀门快速循环启闭装置
US20170133138A1 (en) * 2015-11-09 2017-05-11 Pontiac Coil, Inc. Solenoid system with an armature position sensor
US11473677B2 (en) 2016-12-14 2022-10-18 Lg Innotek Co., Ltd. Driving module and transmission
US11473676B2 (en) * 2020-07-02 2022-10-18 Steering Solutions Ip Holding Corporation Brake transmission shift interlock inhibit pin position detection

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Also Published As

Publication number Publication date
JP2002544433A (ja) 2002-12-24
WO2000070196A1 (fr) 2000-11-23
DE50001622D1 (de) 2003-05-08
US20020041222A1 (en) 2002-04-11
EP1179121B1 (fr) 2003-04-02
US6526928B2 (en) 2003-03-04
DE19922427A1 (de) 2000-11-30

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